Hollow case for media having a base and cover

Abstract

A case for a recording tape cartridge is formed by joining an upper case and a lower case via mutual peripheral walls. A blocking piece, which is disposed to extend along the peripheral wall of the upper case serving as a cover, is inserted into a recess, which is disposed in the lower case serving as a base and opens upward and sideward, and a portion of the recess is blocked off by the blocking piece, whereby an engagement hole is formed that is positioned lower than a parting line (PL) and opens only sideward. According to the invention, it is possible to form a recess that opens only toward the outer surface of the peripheral wall of the base of the case, without disposing undercuts in the base.

1. A hollow case formed by a cover being joined to an open end of a peripheral wall of a base formed in a bottomed container shape, the case including:
 a bottomed recess that is disposed in the peripheral wall of the base and opens to a case outer side surface of the peripheral wall and the open end; and 
 a blocking portion that is projectingly disposed in the cover at the juncture between the cover and the base and inserted into the recess to thereby block off a portion of the recess, 
 wherein when the cover is joined to the base, a bottomed engagement hole, which opens only toward the case outer side surface of the peripheral wall of the base, is formed due to the blocking portion blocking off the portion of the recess. 
 
     
     
       2. The case of  claim 1 , wherein ribs that extend from an inner surface of the blocking portion and abut against a bottom surface of the recess, which bottom surface is oriented in a case vertical direction, are disposed at the inner surface of the blocking portion. 
     
     
       3. The case of  claim 1 , wherein the blocking portion is structured to fit into the recess. 
     
     
       4. The case of  claim 1 , wherein the recess is disposed in a shape protruding from the peripheral wall of the base toward an inner side direction of a case width, and the blocking portion includes a blocking piece that extends out from the cover, such that the blocking piece is substantially flush with the outer surface of the peripheral wall of the base, and blocks off a portion of the recess. 
     
     
       5. A hollow case formed by a cover being joined to an open end of a peripheral wall of a base formed in a bottomed container shape, the case including:
 a recess that is disposed in the peripheral wall of the base and opens to an outer surface of the peripheral wall and the open end; and 
 a blocking portion that is projectingly disposed in the cover at the juncture between the cover and the base and inserted into the recess to thereby block off a portion of the recess, 
 wherein the recess is disposed in a shape protruding from the peripheral wall of the base toward an inner side direction of a case width, and the blocking portion includes a blocking piece that extends out from the cover, such that the blocking piece is substantially flush with the outer surface of the peripheral wall of the base, and blocks off a portion of the recess, 
 wherein ribs that extend from an inner surface of the blocking piece and abut against a bottom surface of the recess, which bottom surface is oriented in a case vertical direction, are disposed at the inner surface of the blocking piece. 
 
     
     
       6. The case of  claim 4 , wherein weight-reducing sections are formed in a bottom surface of the recess which bottom surface is oriented in the case width direction. 
     
     
       7. The case of  claim 4 , wherein the blocking portion is disposed to project toward the case width direction inner side so that it has a shape that covers at least the recess, and weight-reducing sections are formed between a projecting portion and the blocking piece. 
     
     
       8. A hollow case formed by a cover being joined to an open end of a peripheral wall of a base formed in a bottomed container shape, the case including:
 a recess that is disposed in the peripheral wall of the base and opens to an outer surface of the peripheral wall and the open end; and 
 a blocking portion that is projectingly disposed in the cover at the juncture between the cover and the base and inserted into the recess to thereby block off a portion of the recess, 
 wherein the recess is disposed in a shape protruding from the peripheral wall of the base toward an inner side direction of a case width, and the blocking portion includes a blocking piece that extends out from the cover, such that the blocking piece is substantially flush with the outer surface of the peripheral wall of the base, and blocks off a portion of the recess, 
 wherein the blocking portion is disposed to project toward the case width direction inner side so that it has a shape that covers at least the recess, and weight-reducing sections are formed between a projecting portion and the blocking piece, 
 wherein ribs that extend from an inner surface of the blocking piece to the projecting portion and abut against the projecting portion are disposed at the weight-reducing sections. 
 
     
     
       9. The case of  claim 7 , wherein the blocking portion is structured in a shape that substantially corresponds to the recess. 
     
     
       10. A hollow case formed by a cover being joined to an open end of a peripheral wall of a base formed in a bottomed container shape, the case including:
 a recess that is disposed in the peripheral wall of the base and opens to an outer surface of the peripheral wall and the open end; and 
 a blocking portion that is projectingly disposed in the cover at the juncture between the cover and the base and inserted into the recess to thereby block off a portion of the recess, 
 wherein the recess is disposed in a shape protruding from the peripheral wall of the base toward an inner side direction of a case width, and the blocking portion includes a blocking piece that extends out from the cover, such that the blocking piece is substantially flush with the outer surface of the peripheral wall of the base, and blocks off a portion of the recess, 
 wherein the blocking portion is disposed to project toward the case width direction inner side so that it has a shape that covers at least the recess, and a notch serving as a weight-reducing section is formed in a portion of the projecting portion above the blocking piece. 
 
     
     
       11. The case of  claim 10 , wherein the blocking portion is structured in a shape that substantially corresponds to the recess. 
     
     
       12. The case of  claim 4 , wherein the blocking piece is structured to fit into the recess. 
     
     
       13. The case of  claim 3 , wherein a surface of the blocking portion is smoother than a surface of a peripheral wall of the cover. 
     
     
       14. A case including:
 a base formed in a bottomed container shape; 
 a cover having a shape that can be joined to an open end of a peripheral wall of the base, so that a hollow case is formed when the cover is joined to the base; 
 a recess that is disposed in the peripheral wall of the base, protrudes toward an inner side direction of a case width, and opens to the open end and outer surface of the peripheral wall; and 
 a blocking portion that is projectingly disposed in the cover at the juncture between the cover and the base and inserted into the recess to thereby block off a portion of the recess, 
 wherein the blocking portion includes a blocking piece that extends out from the cover and blocks off the portion of the recess, and 
 wherein when the cover is joined to the base, a bottomed engagement hole, which opens only toward the case outer side surface of the peripheral wall of the base, is formed due to the blocking portion blocking off the portion of the recess. 
 
     
     
       15. A case including:
 a base formed in a bottomed container shape; 
 a cover having a shape that can be joined to an open end of a peripheral wall of the base, so that a hollow case is formed when the cover is joined to the base; 
 a recess that is disposed in the peripheral wall of the base, protrudes toward an inner side direction of a case width, and opens to the open end and outer surface of the peripheral wall; and 
 a blocking portion that is projectingly disposed in the cover at the juncture between the cover and the base and inserted into the recess to thereby block off a portion of the recess, 
 wherein the blocking portion includes a blocking piece that extends out from the cover and blocks off the portion of the recess, 
 wherein ribs that extend from an inner surface of the blocking piece and abut against a bottom surface of the recess, which bottom surface is oriented in a case vertical direction, are disposed at the inner surface of the blocking piece. 
 
     
     
       16. The case of  claim 14 , wherein the blocking piece is structured to fit into the recess. 
     
     
       17. The case of  claim 14 , wherein weight-reducing sections are formed in a bottom surface of the recess, which bottom surface is oriented in a case vertical direction. 
     
     
       18. The case of  claim 14 , wherein the blocking portion is disposed to project toward the case width direction inner side so that it has a shape that covers at least the recess at the time of joining, and weight-reducing sections are formed between a projecting portion and the blocking piece. 
     
     
       19. A case including:
 a base formed in a bottomed container shape; 
 a cover having a shape that can be joined to an open end of a peripheral wall of the base, so that a hollow case is formed when the cover is joined to the base; 
 a recess that is disposed in the peripheral wall of the base, protrudes toward an inner side direction of a case width, and opens to the open end and outer surface of the peripheral wall; and 
 a blocking portion that is projectingly disposed in the cover at the juncture between the cover and the base and inserted into the recess to thereby block off a portion of the recess, 
 wherein the blocking portion includes a blocking piece that extends out from the cover and blocks off the portion of the recess, 
 wherein the blocking portion is disposed to project toward the case width direction inner side so that it has a shape that covers at least the recess at the time of joining, and a notch serving as a weight-reducing section is formed in a portion of the projecting portion above the blocking piece. 
 
     
     
       20. The case of  claim 14 , wherein a surface of the blocking portion is smoother than a surface of a peripheral wall of the cover. 
     
     
       21. The case of  claim 1 , further comprising:
 a plurality of recesses that are disposed in the peripheral wall of the base and open to an outer surface of the peripheral wall and the open end; and 
 a plurality of blocking portions that are projectingly disposed in the cover at junctures between the cover and the base and inserted into the recesses to thereby block off a portion of the recesses. 
 
     
     
       22. The case of  claim 1 , wherein a shape of the cover is substantially the same as the shape of the base. 
     
     
       23. The case of  claim 1 , further comprising a cut out corner of the base and the cover.